Ninjastic
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Re: Bitcoin puzzle transaction ~32 BTC prize to who solves it
by
iparktur
on 25/06/2019, 17:35:48 UTC
Quote from: BurtW on June 25, 2019, 11:53:23 AM
Quote from: iparktur on June 25, 2019, 10:16:02 AM
Quote from: Firebox on June 25, 2019, 03:31:47 AM
Hi, folks! Great topic!
Need some of your guru's help. As far as I understood, if we have i.e.
61. 00000000000000000000000000000000000000000000000013C96A3742F64906 - 1AVJKwzs9AskraJLGHAZPiaZcrpDr1U6AB
62.                                                                                                                      - 1Me6EfpwZK5kQziBwBfvLiHjaPGxCKLoJi
63.                                                                                                                      - 1NpYjtLira16LfGbGwZJ5JbDPh3ai9bjf4
64.                                                                                                                      - 16jY7qLJnxb7CHZyqBP8qca9d51gAjyXQN
65. 000000000000000000000000000000000000000000000001a838b13505b26867  - 18ZMbwUFLMHoZBbfpCjUJQTCMCbktshgpe
means that privat keys for #62, 63 & 64 will be somewhere between 13C96A3742F64906:1a838b13505b26867. Am I right?
If yes, how can I narrow the keyspace for #62 only? Even approximate range I believe will be ok fo try. Can a simple hex math be used in this case?
Sorry if its a noob question.


And who prevents you to narrow a range of search?
For search the private keys for address 62 is selected keyspace 2000000000000000 - 3FFFFFFFFFFFFFFF
In this space it is possible to find about 2305843009213693952 variants.
The project has started for a long time, therefore it is possible to assume, that about three quarters of addresses is checked up and among them no required.
I.e. it is necessary to you to check up 2305843009213693952:4 = 576460752303423488 variants
Can try to begin with 3800000000000001

- keyspace 3800000000000001:3FFFFFFFFFFFFFFF

If this quantity of variants 576460752303423488 you divide into speed of generation of keys of your computer that receive a rough operating time

Good luck!
Since the entire search space for #62 is 2000000000000000 to 3FFFFFFFFFFFFFFF

If you search the last 1/4 of the space from 3800000000000001 to 3FFFFFFFFFFFFFFF you will have exactly a 25% chance of finding the key assuming nobody else with much faster hardware finds it first.

Good luck!  You are going to need it.

I with you completely agree!

In a post № 1018 on page 51 I wrote about factors (on statistics) found Private Key
Minimal - K*1.2561547139608029

It is possible to assume, that Private Key for addresses 62 can be in space
From 2000000000000000 x K*1.2561547139608029 up to 3FFFFFFFFFFFFFFF i.e. approximately
From 2800000000000001 and up to 3FFFFFFFFFFFFFFF
I think, that the minimum half of way from 2000000000000001:3FFFFFFFFFFFFFFF already and key is not found.
Then it is possible to try from 3000000000000001 up to 3FFFFFFFFFFFFFFF
In any case on my computer with speed only 0.63 MKey/s to participate in this competition it is senseless.